Electric snap-switch.



BEST AVNLA I I No. 80%636. PATBNTED NOV. 14, 1905. G. B THOMAS. ELECTRIC S'NAP SWITCH. APPLICATION PILEi) NOV. 3, 1904.-

WITNESSES g INVENTOR I a 73, 740m 4 65. Z0 3v 7 ATTORNEYS v BEST AVAlLABLE COP UNITED STATES PATENT OFFICE.

'JrEORGE B.'THOMAS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO Tl PERKINS ELECTRIC SWITCH MANUFACTURING COMPANY, OF BRIDG PORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

ELECTRIC SNAP-SWITCH.

' Specification of Letters Patent.

Patented Nov. 14, 1905.

To all whom it may concern Be it known that I, GEORGE B. THOMAS, a citizen of the United States of America, residing in Bridgeport, in the county of F air- 5 field, State of Connecticut, have invented an Im roved Electric Snap-Switch, of which the follbwin is a specification. The ject of my invention is to construct a self-contained and strong, but sightly elecro tric snap-switch, which is adapted for use on ceilings or like high places, but so that it may conveniently be operated notwithstanding its high position. In the accompanying drawings, Figure 1 r is an elevation of my improved ceiling-switch with the inclosing cap in section. Fig. 2 is a section on the line 2 2, Fig. 1. Fig. 3 is a secverted 2o Figfil. W

in carrying out my invention I may use anywell-known or suitable form of rotary snap-switch, provided it has an insulatingbase A, which by means of screws can be secured to the ceiling or the like and provided the base carries the make-and-break elements of a rotary snap-switch. In the drawings I have shown a single-pole rotary snap-switch with binding-posts and contacts B B and a vertical rotary spindle C, carrying the conducting contact-arm D, and containing the usual spring tensioning and release devices, such as is shown in my Patent No. 687,669, dated November 26, 1901, for example.

I secure to the spindle C, near its outer end, a ratchet-disk E, which may convenient] be formed by stamping and bending a disk of metal to produce the needed inclines, and engaging shoulders or ratchet-teeth, as is common in this art I then mount so as to turn freely upon the upper end a of the switchs indle the sleeve f of a second ratchet -disk F which is an operating-wheel, in a plane parallel with the base A and is provided with a rim or flange f. I also punch up out of this same piece of metal two projecting stops f 2 f The outer end of the sleeve f is preferably guided in an opening 7c, formed in a rectangular yoke K, which is secured to the base A. This opening 7c is formed in the cross-bar of the yok Drn alllw ks mmperspective view of a part shown in tionon the line 3 3, Fig. 1; and Fig. 4 is an in ception of the screw 7L, by which the inclosing ca H is secured over all the working parts, igs. 1 and 2. Around the sleeve f is coiled a spring S, one end of which is secured to the wheel F, while the other is connected to the yoke K in such a way as to tend to keep the stop f 2 up against the stop k on the yoke or frame.

To the flange or rim f of the wheel F, I secure the end of a cord (chain or the like) J, which is coiled part way around the rim and then passed over a grooved pulley P, turning on a pin at right angles to the axis of the wheel F, this in being mounted on" one of the side bars 0 the yoke or frame K. Thence the cord is passed through a guide-eye the cross-bar of the yoke through an open: ing in the end face 7L2 of the cap H. The cord is uided and retained on the rim f of'the dislk F by a curved and grooved cross-piece 17)., carried by the yoke, while a finger n on one of the side bars of the yoke bent over th( pulley 19, Figs. 1 and 4, aids in keeping the cord on the pulley.

When the switch is in place fastened to the ceiling X, the cord J passes down through the face of the cap, so that by pulling on this cord the operating-wheel F is turned against the action of the spring S until the stop f approaches or reaches the stop is on the frame, by which time the snap-switch will have been thrown from the closed position, Figs. 1, 2, and 3, to the open position, or vice versa. Upon the release of the cord J the spring 5 will turn the wheel F back to its normal pOSlfi tion of rest with its ratchet-teeth rengaged with the ratchet-disk E, so that on the next pull of the cord J another semirevolution of the switch will be produced.

By the term cord I wish to embrace not only a cord as such, but its equivalent for the purpose, such as a chain.

I claim as my invention- 1. A snap-switch, comprising an insulating-base adapted to be secured to a ceiling,

the make-and-break elements of a snap" switch carried by the base wheel in a plane para? on the .wheel, a co eratingbase adapted to be secured to a ceiling, a make-and-break elements of a snap itch, an operating-wheel in a plane paralwith the base, a cord-pulley at right sgles to the wheel, an inclosing yoke carry- ;g the pulley and having a guide-eye, and a 0rd secured to the wheel, and passing over he pulley and through said eye.

3. A snap-switch, comprisin an insulating-base, the make-and-break e ements of a snap-switch, an operating-wheel and cord therefor, an inclosing yoke on the base, a

raised bridge formed out of the metal of the yoke, and an inclosing cap secured to said raised bridge.

4. A snap-switch, comprising an insulating-base, the make-and-break elements of a snap-switch, the spindle of which carries a ratchet-disk and an operating-wheel, said wheel consisting of a ratchet-disk having a flange to receive a cord, and a sleeve mount ed on the spindle.

5. A snap-switch comprising an insult ing-base, the make-and-b-reak elements of snap-switch, the spindle of which carries a; operating-wheel parallel to the base, a core therefor and an inclosing yoke on the base, in combination with means on said wheel and on said yoke for retaining and guiding the cord.

6. A snap-switch comprising an insulatiIig-base, the niake-and-break elements of a snap-switch, an operating-wheel parallel to the base and a cord therefor, an inclosing yoke mounted on the base and carrying a pulley, and means on said yoke to aid in eeping the cord on the pulley.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE B. THOMAS.

Witnesses;

G. W. GOODRIDGE, H. G. WALES. 

